{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["engineering feature", "concept or principle", "biomedical", "application", "process characterization", "enabling technology"], "input": "Multi-track and multi-metal seam welds of high temperature metallic sheets , AISI 304 , C-Mn steel , Nickel-based alloys , Cp Cu , Ti6Al4V and low temperature metallic sheets , AA6061 were obtained ."}
{"engineering feature": ["seam welds"], "concept or principle": [], "biomedical": [], "application": [], "process characterization": [], "enabling technology": []}